Siemens ED43B040L - 40 A, 480 V, 3-Pole Circuit Breaker | AmpState

Meet the Siemens ED43B040L — a 40A, 480V, 3-pole molded case circuit breaker designed to safeguard your panelboards and load centers from overcurrent and short-circuit events. Built for dependable branch circuit protection in commercial, residential, and light industrial environments, this unit blends compact efficiency with robust performance.

Why the ED43B040L stands out

• Space‑savvy design: Compact molded case format optimizes panel space without compromising protection, making it ideal for tight electrical closets and dense distribution boards.
• Thermal‑magnetic trip unit: Delivers stable, repeatable protection for both overloads and short circuits across a range of load conditions.
• OEM compatibility: Specifically designed to pair with matching Siemens OEM load centers and panelboards for seamless installation and reliable performance.
• Three‑phase, 480V protection: Perfect for 3‑phase distribution in commercial spaces and light industrial setups, where consistent phase safety matters.
• Targeted protection: Focused on branch circuit overcurrent and short‑circuit scenarios, helping prevent equipment damage and downtime in critical systems.

Ideal applications and use cases

• New installations in panelboards and load centers that require 3‑pole, 480V protection for commercial electrical rooms, data centers, and retail spaces.
• Replacement of existing Siemens breakers in residential, commercial, or light industrial panels to maintain OEM compatibility and predictably protect critical circuits.
• Distribution circuits feeding HVAC, lighting, and power distribution in small to mid‑sized facilities where space is at a premium.

What problems does it solve?

• Prevents damage from overcurrent conditions and short circuits, helping extends equipment life and reduce downtime.
• Maintains reliable protection with a consistent thermal‑magnetic response across varying load profiles.
• Preserves panel organization and simplifies upgrades by aligning with Siemens’ family of OEM load centers and panelboards.

Technical specifications

• Manufacturer: Siemens
• Part Number: ED43B040L
• Type: Thermal‑magnetic molded case circuit breaker
• Amperage Rating: 40A
• Voltage Rating: 480V
• Number of Poles: 3
• Application: Branch circuit overcurrent and short‑circuit protection

Designed for installers who value reliability, compatibility, and space efficiency, the Siemens ED43B040L is a practical choice for safeguarding distribution networks in a variety of settings. Its precise, predictable trip behavior and OEM‑matched compatibility help ensure smooth operation and easier maintenance across the life of the installation.